| 摘要 |
A gas cooler (19) which radiates heat of refrigerant boosted up to supercritical pressure includes: a plurality of fin plates (30) vertically extending and arranged at a predetermined interval; and a plurality of refrigerant channels (34A, 34B, 34C) formed in parallel by heat transfer tube bundles (33) inserted into the fin plates (30) in multiple stages. The refrigerant channels (34A, 34B, 34C) respectively include inlet heat transfer tubes (40A, 40B, 40C) disposed at an upper portion of the fin plates (30), outlet heat transfer tubes (42A, 42B, 42C) disposed at a lower portion of the fin plates (30), and first intermediate heat transfer tubes (41A1, 41B1, 41C1) and second intermediate heat transfer tubes (41A2, 41B2, 41C2) disposed between the inlet heat transfer tubes (40A, 40B, 40C) and the outlet heat transfer tubes (42A, 42B, 42C). |
